| Texto completo | |
| Autor(es): Mostrar menos - |
Chattopadhyay, Shreyasi
;
de Oliveira, Caique Campos
;
Bhar, Rajarshi
;
Banik, Dhiman
;
Pieshkov, Tymofii S.
;
Puthirath, Anand B.
;
Pramanik, Atin
;
Sreeram, P. R.
;
Saju, Sreehari K.
;
Costin, Gelu
;
Vajtai, Robert
;
Dubey, Brajesh K.
;
Biswas, Krishanu
;
da Silva Autreto, Pedro Alves
;
Tiwary, Chandra Sekhar
;
Ajayan, Pulickel M.
Número total de Autores: 16
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SMALL; v. N/A, p. 11-pg., 2025-10-07. |
| Resumo | |
Water electrolysis for hydrogen, though widely studied, presents exciting opportunities for improvement beyond conventional energy and cost-intensive catalysts. Natural ores, being abundant and readily available, hold immense promise as sustainable sources of alternative energy materials. Here, this method offers a simple and low-cost route, not only to make 2D materials but also to develop electrocatalysts from earth-abundant ores. Synthesis of 2D Bi2S3 is demonstrated via Liquid phase exfoliation (LPE) of the naturally abundant bismuthinite ore. Sustainability of such 2D Bi2S3 is explored for hydrogen evolution reaction (HER) from alkaline fresh and simulated seawater. The exfoliated Bi2S3 exhibits an overpotential of 693 and 678 mV at 10 mA cm- 2 in alkaline fresh and simulated seawater with a durability up to 40 h. From Density Functional Theory (DFT) based First-principles calculations, sulfur sites are found to bind H-intermediates strongly in comparison with bismuth sites. Sustainability is further investigated by life cycle calculation. A lower carbon footprint of the 2D Bi2S3 catalyst is observed under both alkaline fresh (21.13 kg CO2eq kg-1 H2) and simulated seawater (15.56 kg CO2eq kg-1 H2). This work extends a sustainable strategy to utilize earth-abundant natural source for fabricating efficient and durable HER electrocatalysts for future fuel. (AU) | |
| Processo FAPESP: | 24/11376-6 - Catalisadores pH-Universais Baseados em Nanoestruturas 2D e Heteroestruturas de van der Waals para Reações de Evolução de Hidrogênio |
| Beneficiário: | Caique Campos de Oliveira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 24/11016-0 - Explorando novas arquiteturas bidimensionais: Propriedades Estruturais, Mecânicas e Eletrônicas de Sólidos não-van der Waals |
| Beneficiário: | Bruno Bueno Ipaves Nascimento |
| Modalidade de apoio: | Bolsas no Brasil - Programa Fixação de Jovens Doutores |